All surgeries will be performed under general anesthesia with epidural analgesia. The surgery will be either performed by or under the direct supervision of pancreatic surgeons with experience in pancreaticojejunostomy surgery. Operative time, blood loss, blood product replacement and all intraoperative details will be recorded in the proforma. Patients will be shifted postoperatively to the anesthesia care unit (PCU) for observation and subsequently to the recovery or high dependency ward once stabilized. Postoperative details including period of postoperative pancreatic fistula,biliary leakage,postoperative haemorrhage,postoperative pancreatitis , hospital stay and other complications will be recorded. Postoperative mortality will be defined as 30-day mortality plus death before discharge after surgery.